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target/arm: Honour HCR_EL2.TGE when raising synchronous exceptions
Whene we raise a synchronous exception, if HCR_EL2.TGE is set then exceptions targeting NS EL1 must be redirected to EL2. Implement this in raise_exception() -- all synchronous exceptions go through this function. (Asynchronous exceptions go via arm_cpu_exec_interrupt(), which already honours HCR_EL2.TGE when it determines the target EL in arm_phys_excp_target_el().) Backports commit 7556edfb4d7bf0583c852c8cfc49ef494c41dd8a from qemu
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@ -32,6 +32,20 @@ static void raise_exception(CPUARMState *env, uint32_t excp,
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{
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CPUState *cs = CPU(arm_env_get_cpu(env));
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if ((env->cp15.hcr_el2 & HCR_TGE) &&
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target_el == 1 && !arm_is_secure(env)) {
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/*
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* Redirect NS EL1 exceptions to NS EL2. These are reported with
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* their original syndrome register value, with the exception of
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* SIMD/FP access traps, which are reported as uncategorized
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* (see DDI0478C.a D1.10.4)
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*/
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target_el = 2;
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if (syndrome >> ARM_EL_EC_SHIFT == EC_ADVSIMDFPACCESSTRAP) {
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syndrome = syn_uncategorized();
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}
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}
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assert(!excp_is_internal(excp));
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cs->exception_index = excp;
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env->exception.syndrome = syndrome;
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